21012001013130 has 32 divisors (see below), whose sum is σ = 50433189516864. Its totient is φ = 5602712816256.

The previous prime is 21012001013099. The next prime is 21012001013167. The reversal of 21012001013130 is 3131010021012.

It is a happy number.

It is a super-2 number, since 2×21012001013130² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30115212 + ... + 30805031.

It is an arithmetic number, because the mean of its divisors is an integer number (1576037172402).

Almost surely, 2^{21012001013130} is an apocalyptic number.

21012001013130 is an abundant number, since it is smaller than the sum of its proper divisors (29421188503734).

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

21012001013130 is a wasteful number, since it uses less digits than its factorization.

21012001013130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60931750.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21012001013130 its reverse (3131010021012), we get a palindrome (24143011034142).

The spelling of 21012001013130 in words is "twenty-one trillion, twelve billion, one million, thirteen thousand, one hundred thirty".