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1220212102 = 25571095343
BaseRepresentation
bin100100010111010…
…1111010110000110
310011001001012022211
41020232233112012
54444333241402
6321025214034
742144426454
oct11056572606
93131035284
101220212102
1157686145a
122a079131a
13165a502c5
14b80b19d4
15721ce4d7
hex48baf586

1220212102 has 8 divisors (see below), whose sum is σ = 1833605856. Its totient is φ = 609010152.

The previous prime is 1220212093. The next prime is 1220212109. The reversal of 1220212102 is 2012120221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220212109) 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, 546558 + ... + 548785.

It is an arithmetic number, because the mean of its divisors is an integer number (229200732).

Almost surely, 21220212102 is an apocalyptic number.

1220212102 is a deficient number, since it is larger than the sum of its proper divisors (613393754).

1220212102 is a wasteful number, since it uses less digits than its factorization.

1220212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095902.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220212102 is about 34931.5344924897. The cubic root of 1220212102 is about 1068.5916493183.

Adding to 1220212102 its reverse (2012120221), we get a palindrome (3232332323).

The spelling of 1220212102 in words is "one billion, two hundred twenty million, two hundred twelve thousand, one hundred two".

Divisors: 1 2 557 1114 1095343 2190686 610106051 1220212102