21020210020016 has 20 divisors (see below), whose sum is σ = 40726899837624. Its totient is φ = 10510042320000.

The previous prime is 21020210019971. The next prime is 21020210020057. The reversal of 21020210020016 is 61002001202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020210019976 and 21020210020003.

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, 1090010 + ... + 6574841.

Almost surely, 2^{21020210020016} is an apocalyptic number.

It is an amenable number.

21020210020016 is a deficient number, since it is larger than the sum of its proper divisors (19706689817608).

21020210020016 is a wasteful number, since it uses less digits than its factorization.

21020210020016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836260 (or 7836254 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21020210020016 its reverse (61002001202012), we get a palindrome (82022211222028).

The spelling of 21020210020016 in words is "twenty-one trillion, twenty billion, two hundred ten million, twenty thousand, sixteen".