21401031030 has 32 divisors (see below), whose sum is σ = 53595627264. Its totient is φ = 5458813536.

The previous prime is 21401030993. The next prime is 21401031031. The reversal of 21401031030 is 3013010412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401031031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15507304 + ... + 15508683.

It is an arithmetic number, because the mean of its divisors is an integer number (1674863352).

Almost surely, 2^21401031030 is an apocalyptic number.

21401031030 is an abundant number, since it is smaller than the sum of its proper divisors (32194596234).

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

21401031030 is a wasteful number, since it uses less digits than its factorization.

21401031030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31016020.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21401031030 its reverse (3013010412), we get a palindrome (24414041442).

The spelling of 21401031030 in words is "twenty-one billion, four hundred one million, thirty-one thousand, thirty".