201211021011021 has 16 divisors (see below), whose sum is σ = 324642991883904. Its totient is φ = 108214330627584.

The previous prime is 201211021010983. The next prime is 201211021011029. The reversal of 201211021011021 is 120110120112102.

It is a happy number.

It is not a de Polignac number, because 201211021011021 - 2¹⁴ = 201211020994637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211021011029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281808152320 + ... + 281808153033.

It is an arithmetic number, because the mean of its divisors is an integer number (20290186992744).

Almost surely, 2^{201211021011021} is an apocalyptic number.

201211021011021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201211021011021 is a deficient number, since it is larger than the sum of its proper divisors (123431970872883).

201211021011021 is a wasteful number, since it uses less digits than its factorization.

201211021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563616305380.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201211021011021 its reverse (120110120112102), we get a palindrome (321321141123123).

The spelling of 201211021011021 in words is "two hundred one trillion, two hundred eleven billion, twenty-one million, eleven thousand, twenty-one".