1010012121 has 12 divisors (see below), whose sum is σ = 1459261440. Its totient is φ = 673177560.

The previous prime is 1010012117. The next prime is 1010012131. The reversal of 1010012121 is 1212100101.

It is a happy number.

It is not a de Polignac number, because 1010012121 - 2² = 1010012117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1010012131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34216 + ... + 56486.

It is an arithmetic number, because the mean of its divisors is an integer number (121605120).

Almost surely, 2^1010012121 is an apocalyptic number.

It is an amenable number.

1010012121 is a deficient number, since it is larger than the sum of its proper divisors (449249319).

1010012121 is a wasteful number, since it uses less digits than its factorization.

1010012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27316 (or 27313 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1010012121 is about 31780.6878622852. The cubic root of 1010012121 is about 1003.3262971463.

Adding to 1010012121 its reverse (1212100101), we get a palindrome (2222112222).

The spelling of 1010012121 in words is "one billion, ten million, twelve thousand, one hundred twenty-one".