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20212121012 = 225053030253
BaseRepresentation
bin10010110100101111…
…000111110110110100
31221011121200010120112
4102310233013312310
5312343300333022
613141343522152
71313606123336
oct226457076664
957147603515
1020212121012
118632240746
123b00bb9358
131ba1617025
14d9a541456
157d46bb8e2
hex4b4bc7db4

20212121012 has 6 divisors (see below), whose sum is σ = 35371211778. Its totient is φ = 10106060504.

The previous prime is 20212121009. The next prime is 20212121021. The reversal of 20212121012 is 21012121202.

It can be written as a sum of positive squares in only one way, i.e., 14485566736 + 5726554276 = 120356^2 + 75674^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2526515123 + ... + 2526515130.

It is an arithmetic number, because the mean of its divisors is an integer number (5895201963).

Almost surely, 220212121012 is an apocalyptic number.

It is an amenable number.

20212121012 is a deficient number, since it is larger than the sum of its proper divisors (15159090766).

20212121012 is a wasteful number, since it uses less digits than its factorization.

20212121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053030257 (or 5053030255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20212121012 its reverse (21012121202), we get a palindrome (41224242214).

The spelling of 20212121012 in words is "twenty billion, two hundred twelve million, one hundred twenty-one thousand, twelve".

Divisors: 1 2 4 5053030253 10106060506 20212121012