201211220021010 has 32 divisors (see below), whose sum is σ = 482911673625792. Its totient is φ = 53655798052800.

The previous prime is 201211220020973. The next prime is 201211220021029. The reversal of 201211220021010 is 10120022112102.

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 15 ways as a sum of consecutive naturals, for example, 29846916 + ... + 35961935.

It is an arithmetic number, because the mean of its divisors is an integer number (15090989800806).

Almost surely, 2^{201211220021010} is an apocalyptic number.

201211220021010 is an abundant number, since it is smaller than the sum of its proper divisors (281700453604782).

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

201211220021010 is a wasteful number, since it uses less digits than its factorization.

201211220021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65910778.

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

Adding to 201211220021010 its reverse (10120022112102), we get a palindrome (211331242133112).

The spelling of 201211220021010 in words is "two hundred one trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, ten".