1021121112201 has 16 divisors (see below), whose sum is σ = 1369479988800. Its totient is φ = 676756928448.

The previous prime is 1021121112199. The next prime is 1021121112203. The reversal of 1021121112201 is 1022111211201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1021121112199) and next prime (1021121112203).

It is not a de Polignac number, because 1021121112201 - 2¹ = 1021121112199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021121112203) 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, 1691655 + ... + 2214483.

It is an arithmetic number, because the mean of its divisors is an integer number (85592499300).

Almost surely, 2^{1021121112201} is an apocalyptic number.

It is an amenable number.

1021121112201 is a deficient number, since it is larger than the sum of its proper divisors (348358876599).

1021121112201 is a wasteful number, since it uses less digits than its factorization.

1021121112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526648.

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

Adding to 1021121112201 its reverse (1022111211201), we get a palindrome (2043232323402).

The spelling of 1021121112201 in words is "one trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred one".