102021211220111 has 32 divisors (see below), whose sum is σ = 111353291440128. Its totient is φ = 93216534885760.

The previous prime is 102021211220083. The next prime is 102021211220113. The reversal of 102021211220111 is 111022112120201.

It is not a de Polignac number, because 102021211220111 - 2¹⁴ = 102021211203727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021211220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021211220113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6281465 + ... + 15604461.

It is an arithmetic number, because the mean of its divisors is an integer number (3479790357504).

Almost surely, 2^{102021211220111} is an apocalyptic number.

102021211220111 is a deficient number, since it is larger than the sum of its proper divisors (9332080220017).

102021211220111 is a wasteful number, since it uses less digits than its factorization.

102021211220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323311.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102021211220111 its reverse (111022112120201), we get a palindrome (213043323340312).

The spelling of 102021211220111 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".