1011022212121 has 4 divisors (see below), whose sum is σ = 1026112095952. Its totient is φ = 995932328292.

The previous prime is 1011022212103. The next prime is 1011022212143. The reversal of 1011022212121 is 1212122201101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011022212121 - 2⁵ = 1011022212089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011022212095 and 1011022212104.

It is not an unprimeable number, because it can be changed into a prime (1011022272121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7544941815 + ... + 7544941948.

It is an arithmetic number, because the mean of its divisors is an integer number (256528023988).

Almost surely, 2^{1011022212121} is an apocalyptic number.

It is an amenable number.

1011022212121 is a deficient number, since it is larger than the sum of its proper divisors (15089883831).

1011022212121 is an equidigital number, since it uses as much as digits as its factorization.

1011022212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15089883830.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1011022212121 its reverse (1212122201101), we get a palindrome (2223144413222).

The spelling of 1011022212121 in words is "one trillion, eleven billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".