21012010311030 has 32 divisors (see below), whose sum is σ = 50566233014784. Its totient is φ = 5587935164256.

The previous prime is 21012010311029. The next prime is 21012010311067. The reversal of 21012010311030 is 3011301021012.

It is a happy number.

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

It is a congruent number.

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, 954212892 + ... + 954234911.

It is an arithmetic number, because the mean of its divisors is an integer number (1580194781712).

Almost surely, 2^{21012010311030} is an apocalyptic number.

21012010311030 is an abundant number, since it is smaller than the sum of its proper divisors (29554222703754).

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

21012010311030 is a wasteful number, since it uses less digits than its factorization.

21012010311030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908448180.

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

Adding to 21012010311030 its reverse (3011301021012), we get a palindrome (24023311332042).

The spelling of 21012010311030 in words is "twenty-one trillion, twelve billion, ten million, three hundred eleven thousand, thirty".