101022001221 has 16 divisors (see below), whose sum is σ = 137525036544. Its totient is φ = 65945522544.

The previous prime is 101022001147. The next prime is 101022001247. The reversal of 101022001221 is 122100220101.

It is a de Polignac number, because none of the positive numbers 2^k-101022001221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101022001197 and 101022001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101022001261) 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, 1471215 + ... + 1538348.

It is an arithmetic number, because the mean of its divisors is an integer number (8595314784).

Almost surely, 2^101022001221 is an apocalyptic number.

It is an amenable number.

101022001221 is a deficient number, since it is larger than the sum of its proper divisors (36503035323).

101022001221 is a wasteful number, since it uses less digits than its factorization.

101022001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009800.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101022001221 its reverse (122100220101), we get a palindrome (223122221322).

The spelling of 101022001221 in words is "one hundred one billion, twenty-two million, one thousand, two hundred twenty-one".