1071620121 has 64 divisors (see below), whose sum is σ = 1824399360. Its totient is φ = 549504000.

The previous prime is 1071620057. The next prime is 1071620131. The reversal of 1071620121 is 1210261701.

It is a happy number.

It is not a de Polignac number, because 1071620121 - 2⁶ = 1071620057 is a prime.

It is a super-2 number, since 2×1071620121² = 2296739367464109282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071620131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 250561 + ... + 254801.

It is an arithmetic number, because the mean of its divisors is an integer number (28506240).

Almost surely, 2^1071620121 is an apocalyptic number.

1071620121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1071620121 is a deficient number, since it is larger than the sum of its proper divisors (752779239).

1071620121 is a wasteful number, since it uses less digits than its factorization.

1071620121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1071620121 is about 32735.6093726694. The cubic root of 1071620121 is about 1023.3250840429.

Adding to 1071620121 its reverse (1210261701), we get a palindrome (2281881822).

The spelling of 1071620121 in words is "one billion, seventy-one million, six hundred twenty thousand, one hundred twenty-one".