211221210200010 has 64 divisors (see below), whose sum is σ = 511944739257600. Its totient is φ = 55769296822272.

The previous prime is 211221210199997. The next prime is 211221210200023. The reversal of 211221210200010 is 10002012122112.

211221210200010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211221210199997) and next prime (211221210200023).

It is a super-2 number, since 2×211221210200010² (a number of 29 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 31 ways as a sum of consecutive naturals, for example, 18314374 + ... + 27529233.

It is an arithmetic number, because the mean of its divisors is an integer number (7999136550900).

Almost surely, 2^{211221210200010} is an apocalyptic number.

211221210200010 is an abundant number, since it is smaller than the sum of its proper divisors (300723529057590).

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

211221210200010 is a wasteful number, since it uses less digits than its factorization.

211221210200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45845135.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211221210200010 its reverse (10002012122112), we get a palindrome (221223222322122).

The spelling of 211221210200010 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, ten".