1211002201101 has 16 divisors (see below), whose sum is σ = 2013094568448. Its totient is φ = 629092052400.

The previous prime is 1211002201051. The next prime is 1211002201109. The reversal of 1211002201101 is 1011022001121.

It is not a de Polignac number, because 1211002201101 - 2⁶ = 1211002201037 is a prime.

It is a super-2 number, since 2×1211002201101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211002201109) 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, 2621216655 + ... + 2621217116.

It is an arithmetic number, because the mean of its divisors is an integer number (125818410528).

Almost surely, 2^{1211002201101} is an apocalyptic number.

1211002201101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211002201101 is a deficient number, since it is larger than the sum of its proper divisors (802092367347).

1211002201101 is a wasteful number, since it uses less digits than its factorization.

1211002201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242433792.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211002201101 its reverse (1011022001121), we get a palindrome (2222024202222).

The spelling of 1211002201101 in words is "one trillion, two hundred eleven billion, two million, two hundred one thousand, one hundred one".