20121012092 has 24 divisors (see below), whose sum is σ = 35344256640. Its totient is φ = 10022687280.

The previous prime is 20121012091. The next prime is 20121012151. The reversal of 20121012092 is 29021012102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121012091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4088009 + ... + 4092927.

It is an arithmetic number, because the mean of its divisors is an integer number (1472677360).

Almost surely, 2^20121012092 is an apocalyptic number.

It is an amenable number.

20121012092 is a deficient number, since it is larger than the sum of its proper divisors (15223244548).

20121012092 is a wasteful number, since it uses less digits than its factorization.

20121012092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8561 (or 8559 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20121012092 its reverse (29021012102), we get a palindrome (49142024194).

The spelling of 20121012092 in words is "twenty billion, one hundred twenty-one million, twelve thousand, ninety-two".