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101221221021 = 3157955122501
BaseRepresentation
bin101111001000101000…
…0010100001010011101
3100200021021120210112220
41132101100110022131
53124300113033041
6114300030015553
710212233116434
oct1362120241235
9320237523486
10101221221021
1139a22816578
121774a9475b9
13971182402b
144c8331611b
152976567d66
hex179141429d

101221221021 has 16 divisors (see below), whose sum is σ = 135841513728. Its totient is φ = 67041000000.

The previous prime is 101221220981. The next prime is 101221221061. The reversal of 101221221021 is 120122122101.

It is an interprime number because it is at equal distance from previous prime (101221220981) and next prime (101221221061).

It is not a de Polignac number, because 101221221021 - 215 = 101221188253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221221061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4487271 + ... + 4509771.

It is an arithmetic number, because the mean of its divisors is an integer number (8490094608).

Almost surely, 2101221221021 is an apocalyptic number.

It is an amenable number.

101221221021 is a deficient number, since it is larger than the sum of its proper divisors (34620292707).

101221221021 is a wasteful number, since it uses less digits than its factorization.

101221221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32212.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101221221021 its reverse (120122122101), we get a palindrome (221343343122).

The spelling of 101221221021 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".

Divisors: 1 3 157 471 9551 22501 28653 67503 1499507 3532657 4498521 10597971 214907051 644721153 33740407007 101221221021