21001231021132 has 12 divisors (see below), whose sum is σ = 36752549745240. Its totient is φ = 10500502522496.

The previous prime is 21001231021097. The next prime is 21001231021171. The reversal of 21001231021132 is 23112013210012.

It is a super-2 number, since 2×21001231021132² (a number of 27 digits) contains 22 as substring.

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, 27828118 + ... + 28572829.

It is an arithmetic number, because the mean of its divisors is an integer number (3062712478770).

Almost surely, 2^{21001231021132} is an apocalyptic number.

It is an amenable number.

21001231021132 is a deficient number, since it is larger than the sum of its proper divisors (15751318724108).

21001231021132 is a wasteful number, since it uses less digits than its factorization.

21001231021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56494040 (or 56494038 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21001231021132 its reverse (23112013210012), we get a palindrome (44113244231144).

The spelling of 21001231021132 in words is "twenty-one trillion, one billion, two hundred thirty-one million, twenty-one thousand, one hundred thirty-two".