21012000011232 has 192 divisors, whose sum is σ = 57071940968448. Its totient is φ = 6764539392000.

The previous prime is 21012000011221. The next prime is 21012000011243. The reversal of 21012000011232 is 23211000021012.

It is an interprime number because it is at equal distance from previous prime (21012000011221) and next prime (21012000011243).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167402257 + ... + 167527727.

It is an arithmetic number, because the mean of its divisors is an integer number (297249692544).

Almost surely, 2^{21012000011232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21012000011232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28535970484224).

21012000011232 is an abundant number, since it is smaller than the sum of its proper divisors (36059940957216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012000011232 is a wasteful number, since it uses less digits than its factorization.

21012000011232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125953 (or 125945 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21012000011232 its reverse (23211000021012), we get a palindrome (44223000032244).

The spelling of 21012000011232 in words is "twenty-one trillion, twelve billion, eleven thousand, two hundred thirty-two".