2156111101052 has 12 divisors (see below), whose sum is σ = 3774137517696. Its totient is φ = 1077786096000.

The previous prime is 2156111101043. The next prime is 2156111101063. The reversal of 2156111101052 is 2501011116512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67345628 + ... + 67377635.

It is an arithmetic number, because the mean of its divisors is an integer number (314511459808).

Almost surely, 2^{2156111101052} is an apocalyptic number.

It is an amenable number.

2156111101052 is a deficient number, since it is larger than the sum of its proper divisors (1618026416644).

2156111101052 is a wasteful number, since it uses less digits than its factorization.

2156111101052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134727268 (or 134727266 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 26.

Adding to 2156111101052 its reverse (2501011116512), we get a palindrome (4657122217564).

The spelling of 2156111101052 in words is "two trillion, one hundred fifty-six billion, one hundred eleven million, one hundred one thousand, fifty-two".