211021010021210 has 16 divisors (see below), whose sum is σ = 379846740001896. Its totient is φ = 84406421349888.

The previous prime is 211021010021207. The next prime is 211021010021221. The reversal of 211021010021210 is 12120010120112.

It can be written as a sum of positive squares in 4 ways, for example, as 209310321288721 + 1710688732489 = 14467561^2 + 1307933^2 .

It is a super-2 number, since 2×211021010021210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247385267 + ... + 248236806.

Almost surely, 2^{211021010021210} is an apocalyptic number.

211021010021210 is a deficient number, since it is larger than the sum of its proper divisors (168825729980686).

211021010021210 is a wasteful number, since it uses less digits than its factorization.

211021010021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495664657.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211021010021210 its reverse (12120010120112), we get a palindrome (223141020141322).

The spelling of 211021010021210 in words is "two hundred eleven trillion, twenty-one billion, ten million, twenty-one thousand, two hundred ten".