21012001162 has 16 divisors (see below), whose sum is σ = 33201195840. Its totient is φ = 9945747648.

The previous prime is 21012001121. The next prime is 21012001163. The reversal of 21012001162 is 26110021012.

It is not an unprimeable number, because it can be changed into a prime (21012001163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150303 + ... + 254194.

It is an arithmetic number, because the mean of its divisors is an integer number (2075074740).

Almost surely, 2^21012001162 is an apocalyptic number.

21012001162 is a deficient number, since it is larger than the sum of its proper divisors (12189194678).

21012001162 is a wasteful number, since it uses less digits than its factorization.

21012001162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405885.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21012001162 its reverse (26110021012), we get a palindrome (47122022174).

The spelling of 21012001162 in words is "twenty-one billion, twelve million, one thousand, one hundred sixty-two".