1021211112201 has 32 divisors (see below), whose sum is σ = 1564381879296. Its totient is φ = 580458312000.

The previous prime is 1021211112199. The next prime is 1021211112217. The reversal of 1021211112201 is 1022111121201.

It is a happy number.

It is not a de Polignac number, because 1021211112201 - 2¹ = 1021211112199 is a prime.

It is a super-2 number, since 2×1021211112201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021211112241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7960911 + ... + 8088171.

It is an arithmetic number, because the mean of its divisors is an integer number (48886933728).

Almost surely, 2^{1021211112201} is an apocalyptic number.

It is an amenable number.

1021211112201 is a deficient number, since it is larger than the sum of its proper divisors (543170767095).

1021211112201 is a wasteful number, since it uses less digits than its factorization.

1021211112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129293.

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

Adding to 1021211112201 its reverse (1022111121201), we get a palindrome (2043322233402).

The spelling of 1021211112201 in words is "one trillion, twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred one".