21012001432102 has 4 divisors (see below), whose sum is σ = 31518002148156. Its totient is φ = 10506000716050.

The previous prime is 21012001432073. The next prime is 21012001432127. The reversal of 21012001432102 is 20123410021012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21012001432102² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21012001432102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253000358024 + ... + 5253000358027.

It is an arithmetic number, because the mean of its divisors is an integer number (7879500537039).

Almost surely, 2^{21012001432102} is an apocalyptic number.

21012001432102 is a deficient number, since it is larger than the sum of its proper divisors (10506000716054).

21012001432102 is a wasteful number, since it uses less digits than its factorization.

21012001432102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506000716053.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21012001432102 its reverse (20123410021012), we get a palindrome (41135411453114).

The spelling of 21012001432102 in words is "twenty-one trillion, twelve billion, one million, four hundred thirty-two thousand, one hundred two".